In my CentOS 8 OCI instance, I have some iptables rules on all of the INPUT, OUTPUT and FORWARD chains with the OUTPUT chain also jumping to a BareMetalInstanceServices chain.
Where do these rules come from? They do not come from firewalld and nothing in the configuration of the instance seems to influence them. They do not reflect the rules I have configured in the Security List for my VCN.
So where are these configured? How do I add rules to whatever is responsible for configuring those?